Concrete-laying machine.



E. l. DAVIS.

CONCRETE LAYING MACHINE.

APPLICATION mso 9m18.191s.

, EL Daz/1155, "6g

EDMUND I. DAVIS, OF ANDERSON, CALIFORNIA.

coNcRErE-LAYLNG MACHINE.

Specication of Letters Patent.

Patented Dec. 18, 1917.

Apllication med December 1s, 191e. serial No. 137,645.

To all 'whom it may concern:

Be it known that I, EDMUND I. DAVIS, a citizen of the United States, residing at Anderson, in the county of Shasta and State of California, have inventedcertain new and useful Improvements in Concrete-Laying Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to concrete laying machines and has for its object to provide a machine of this nature which will be certain in action, efficient in operationand lessr costly to manufacture than those which have been heretofore proposed.

With these and other objects in view the invention consists in the novel details of construction and combinations of parts more fully hereinafter disclosed and particularly pointed out in the claims.

Referring to the accompanying drawings forming a part of this specification in which like numerals designate like parts in all the v1ews:- v

Figure 1 is a diagrammatic perspective view partly broken away of a machine made in accordance with this invention; and

Fig. 2 is a transverse sectional view of the parts shown in Fig. 1.

1 indicates a sled like member provided with an upwardly flared forward portion 2, and adapted to be dragged over the roadbed 3. Suitably attached to the sled like member are the end wall members 4 and extending between said wall members 4 is the forward hopper wall member or plate 5. Rigidly attached to the said wall member or plate 5, as by the angles 7, are one or moredivision members 6. Associated with the unattached rear edges 8 of the division members 6 is the vertically slidable rear wall member or plate 9, thus completing a series of hoppers 10, 11 and 12 having rigid front walls formed by the plate 5 and vertically movable rear walls formed by the plate 9. The said plate l9 has rigidly attached thereto the angles 13 and 14 to which are attached the members 15 provided with the eccentric straps 16 encircling the eccentrics 17 mounted on the shaft 18 journaled in the bearings 19, carried by the end wall members 4 as illustrated. The said shaft 18 is provided with any suitable means for receiving power chine will be slowly such for example as the sprocket 20. Located to the rear of the vertically movable v plate 9 is the plate 25 which is of a less height than the plate 9 and which has rigidly attached thereto, as "by the angles 26, the division members 27 having the forward edges 28 that are unattached to the plate 9,

-as it falls from a Lhigher position' to a lower position.

The said plate 25 has suitably secured thereto, `as by the hingesI 36, a smoothing plate such as 37 adapted to ride over the-v laid concrete and smooth ofiI its surface.

The extreme'end walls 4 of the machine are provided with the extensions 40 adapted to extend down below the edge of the laid concrete, and to smooth the same off as will be readily understood from the drawings.

The operation of this machine will be clear from the foregoing, but may be briefly summarized as follows The roadbed 3 is prepared as usual for the laying of concrete whereupon the madrawn thereover by any suitable means suc as 41, and concrete such as 42 is placed within the hoppers such as 10, 11 and 12 by any suitable means, as -for example, the spout 43. As the machine is slowly `drawn over the roadbed 3 the sprocket 20 is rotated by any suitable means, as for example, the sprocket chain 44 whereuponthe rear plate 9 is jigged up and down by the action of the cams 17 and the concrete escapes from underneath the tamping member 32 while it is being tamped to a greater or less extent into position. When fine material such as 46 escapes past the said tamping means 32, it is caught in pers such as 30 andv 31 and is eventually worked into the main body 47 of the con-v crete. The rearmost plate 25 follows the plate 9v and serves to still further smooth sol olf the laid concrete 47 while the hinged or v bed, yet of ing concrete on a comparatively level roadcourse, it is adapted to lay concrete on inclined surfaces. ln fact, it can be inclined to a considerable angle andstill operate. When so inclined the division members such end of the machine. f

It is obvious that those skilled in the art may vary the details of the construction as well as the arrangement of parts without for moving said wall up and down to permit said concrete to escape from the bottom of said hopper; and means for moving said hopper over the surface to be concreted while said wall is being moved up and down, substantially as described.

2. ln a concrete laying machine the combination of a bottomless hopper having a movable ,wall adapted to hold concrete; means for supporting said hopper with its bottom at wa predetermined distance above the surface to be concreted; means for moving said hopper and concrete over said surface; means for jigging said movable wall up and down while so moving said hopper to permit said concrete to escape from said hopper; and means associated' with said movable wall for tamping the escaping` concrete, substantially as described.

3. In a concrete laying machine the com- -bination of a hopper having a xed frontv wall and a vertically movable rear wall adapted tol permit concrete 'to escape from said hopper as the surface to be concreted; means to automatically move said rear wall upr and down;

means to move said machine over said surface; a third wall positioned inrear of said second mentioned wall; partitions between said third wall and said movable wall and means associated with said third wallfor smoothing 0E the top surface of the laid concrete during the same movement of said machine,`substantially as described.

4. ln a concrete laying machine the combination of a hopper having a fixed front wall and a movable rear wall adapted te; permit concrete to escape from said hopper as themachine is movedover the surface to be concreted; means to lmove said machine over said surface; means for jigging said j, movable w'all up and down during the movement of said machine to permit the said con-A crete to escape from said hopper; -a thirdy t as 6 and 27 serve to prevent the concrete 42 from slipping from end to the machine is moved over- -lower edge; means remate l wall positioned in rear of said second mentioned wall; and means associated with said.

third wall forsmoothing 0H the top surface of the laid concrete during the said movement of said machine, lsubstantial1y as del adapted to smooth oli' the surface of the laid concrete during the said movement `of said machine; substantially as described.

6. ln a concrete laying machine the combination of means for moving the same over the surface to be concreted; a bottomless hopper comprising a fixed front plate and a vertically movable rear plate whose lower edge is positioned higher than the lower edge of said front plate to permit concrete to escapey thereunder as said machine is moved; a tamping means carried by said lower edge; means to jig said movable plate andtamping means up and down as said concrete escapes from said hopper; and means associated with said movable plate for catching' any wet and loose concrete which is not thus tamped, substantially as described.

7. ln a concrete laying machine the combination of means for-moving the same over the surface to be concreted; a bottomless hopper comprising a fixed front plate and a vertically movable rear plate whose lower edge is positioned higher than the lower edge of said front plate to permit concrete to escape thereunder as said machine is moved; a tamping means carried by said to jig said Amovable plate and tamping means up and down as said concrete escapes from said hopper; means associated with said movable plate for catching any wet and loose concrete which is not thus tamped; and a hinged smoothing means` for the tamped `concrete adapted to finish 0H the surface thereof, substantially as described.

8. ln a concrete laying machine the comvto escape thereunder as said machine is moved; a tamping means carried by said lower edge; means'comprising a cam to jig said movable plate and tamping means up MWD and down as said concrete escapes from said In testimony whereof aix my signature; hopper; meals conlprisilg an algiilialry htf p in presence of two Witnesses.

per associate Wit sai mova e p ate or catching any wet and loose concrete which EDMUND I DAVIS' is not thus tamped; and a plate hinged to Witnesses;

said auxiliary hop er for surfacin the laid JOHN KLUPPERT, concrete; substantlally as describe ELLA Hos'rEclLER. 

